[ticket/12808] Fix small gap between username and drop-down arrow

PHPBB3-12808
Merge remote-tracking branch 'PayBas/ticket/12808' into develop-ascraeus

* PayBas/ticket/12808:
  [ticket/12808] Fix small gap between username and drop-down arrow
Merge branch 'develop-ascraeus' into develop

* develop-ascraeus:
  [ticket/12808] Fix small gap between username and drop-down arrow